here it is man if you are talking to the bulb underneath the side mirror...its is T10 bulb....
LEDwholesalers T10 LED 194 Wedge base, Dash Board or Dome Light Bulbs 12v DC 15 SMD LED 1.44 Watt 105 Lumen Warm White, 1415WW : Amazon.com : Automotive

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Call Me For Tires: 732-421-6931
Past
2000 E46 325i
2006 E53 4.4i Sport
2006 X5 4.8is
2011 E90 328xi
2011 E71 50i Fully Loaded :thumb up:
Current
2000 E39 528i
2013 F10 M5
2013 F10 535xi
2017 X3
2017 Sedona
2017 Optima
2016 Fiesta